Force feed lubricator



April 3, 1934. c. A. PARSONS ET AL FORCE FEED LUBRICATOR INVENTORS 2Sheets-Sheet 1 Filed July 16, 1932 2 Sheets-Sheet 2 INVENTORS, A7. gramsATTORNEY} Apnl 3, 1934. c. A. PARSONS ET AL FORCE FEED LUBRICATOR FiledJuly 16, 1932 Patented Apr. 3, 1934 FORCE FEED LUBRICATOR Clyde A.Parsons and Louis W. Drott, Detroit, Mich, assignors to McCord Radiator& Mfg. (30., 7, Detroit, Mich, a corporation of Maine Application .iuly16, 1932, Serial No. 622,913

10 Claims.

This invention relates to force feed lubricators. The main object of ourinvention is to provide a lubricator in which the pumping unit is in theform of a self contained single fixture having connectecl priming anddelivery pumps so that the unit may be handled intact for insertion intoand removal from the reservoir without disturbing any of the other unitstherein or the operating mechanism therefor or the setting or adjustmentof the same.

Another object of our invention is to arrange the several elements ofthe priming and delivery pumps in axial alinement with the movable oroperable element for the pumps in the form of a member located betweenand slidably supported by the piston and cylinder elements of saidpumps, which elements are at the opposite ends of the unit.

A further object of our invention is to have this movable element formthe cylinder and piston elements, respectively, for the delivery andpriming pumps and by having a passage in said member provide meanswhereby the pumps are connected for the flow of oil from the primingpump to the delivery pump.

A further object of our invention is to locate the priming pump at thelower end of the unit and provide such pump with an intake port sodisposed or arranged that priming of the unit will be immediatelyeffected on operating the unit after refilling of the reservoir to alevel above the port and thus prevent the unit from becoming air boundshould the unit have been operated while the reservoir was dry.

Other and further objects of our invention will appear from thefollowing specification taken in connection with the accompanyingdrawings, in which: Fig. 1 is a front elevational view of our improvedlubricator, parts being shown broken away and in section, respectively,for the purpose of illustration;

Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1; and

Fig. 3 is a similar sectional View through the primary pump cylinder ofthe unit illustrating the manner in which air escapes from the cylinderwhen priming the unit.

The lubricator shown in the drawings is of the multiple unit type havinga plurality of vertically disposed pumping units 1, 1 arranged in sideby side relation in an oil containing reservoir in the form of abox-like tank or casing 2 common to all of the units. The latter extenddownwardly into the reservoir through its top wall or cover 3 which hasindividual openings to receive the units. The cover 3 has an upstandingboss structure 4 about the openings to support and provide seats for theunits, there being set screws 5 at the boss structure to secure theunits therein, as shown in Fig. 2. As the units are similar inconstruction and operation, a description of one will sufiice for all.

The portion of the unit above the cover 3 is provided with a liquidcontaining chamber 6 through which extends an oil drop or globuleguiding and conveying wire 7. The chamber 6 has glass or othertransparent covered sight openings 8, 8, on opposite sides as shown. Thewire leads from the inlet to the discharge end of the chamber where anipple connects the unit to its oil conducting line, as in lubricatorsof this general character.

The pumping mechanism of the unit extends into the reservoir andcomprises a pair of pump elements, arranged in axial alinement one abovethe other, and constituting the priming and delivery pumps of the unit.The delivery pump comprises a stationary piston element 9 and a movablecylinder element 10. The latter is slidably mounted on the pistonelement which is in the form of a tube secured to and extendingdownwardly from thepart of the unit fitting in the boss .4. The cylinderelement 10 is moved endwise on the tubeby a spring 11 and a cam 12,respectively. The spring surrounds the cylinder 10 and normally urgesthe same downwardly against one end of a rock lever 13, the camoperating on the opposite end of the lever, as shown. The end of thelever at the cylinder 10 straddles it beneath an abutment or flangethereon as indicated in Fig. 2. Cam 12 and lever 13 are mounted onshafts 14, 15, respectively, supported in the reservoir 2 and extendinglengthwise thereof to serve all of the units. Intermittent rotarymovement is imparted to the cam shaft 14 by a ratchet mechanismcomprising a pawl 16 on a driving shaft 17 and a ratchet wheel 18 on thecam shaft 14. The driving shaft 17, as shown in Fig. 1, may be alinedwith the cam shaft 14 and be oscillated back and forth through an arm(not shown) fixed to the shaft 17 and actuated from the drive of theengine or machine with which the lubricator is used. The ratchet wheel18 is fixed to the cam shaft, while the pawl is carried by an arm lfiafixed to the driving shaft 1'7 as shown in Fig. 1.

The priming pump comprises a movable piston element 19 and a stationarycylinder element 20, the latter being at the lower end of the pumpassembly and forced against the bottom wall of about said elements.

the reservoir or tank 2 by a coiled spring 21 Piston element 19 has anaxial passage which connects at its opposite ends with the respectivecylinder elements of the two pumps, there being ball check valves 22, 23at opposite ends of the passage.

nder e m-es 9 erit i it p h wall with an 511 intake port or op ni g 2%which is openedand closed in the upward'and downward movement of thepiston element 19. Port 24 is located at or adjacent the end of the up?stroke of the piston and thus is disposed at'the upper end or at thehighest point of the oil receiving space of the cylinder. With the portso disposed and opening directly into the reservoir, as shown in Fig. 2,the oil in the reservoir may fiow by gravity into the cylinder 20, assoon as the port 24 is uncovered by the piston. Any air in the cylinderat the priming of the pump will be displaced by the infiowing oil andescape directly and freel to the reservoir 2 through the open po t histen ow r e e is l sed a the oil in the cylinder 29 will be forced intothe axial passage in the piston past the check valve Wh h hi passa e fils. i w l e delivered to the cylinder 10 on each downward or pressure tke at the is e .9 an be diee ereed r m the unit on each pressure strokeof the cylinder 10.

W h the ind 29 eeete at h ewe n 9f th um unit e t l e spo d e ee ladjacent the bottom of the reservoir and thus remain submerged in theoil until the reservoir becomes practically drys Should the lubricatorbe operated when the reservoir is dry, that is, when h ev l it h lew hpe 2 e p p u i Wh l hum in e t air w n beeeme bound because the intakeport 24 will allow the h hh. t P ime eh r filli he reservoir. fi he th rer oir the yhhel 20 w l st nt y the m meht the' e t 4;. s uncovered b heP n an e h mp. W11 b P me th a n th y ind r h p! he piston 19 b ndieplee n the e r ehr y the heemihe l'- e when 1 will thus soon becomefilled with oil on its first few t e eh e1 Wi l b de ive d from e n t ihe 111 effeete eee ed by mh hi the n W le. d h i n he nit ahead o he 1coining oil will be forced out of the unit by the h eeh t e ry hh and itwil no h come trapped in the unit or in the line to intere e i or h h ir he i ten ed op at on o the whee he. ieh e he a 2 iees fel ew Whe theparts are in the positions shown Fig. 2, the priming pump is at the endof its intake stroke and the delivery pump; is at the end of its com:pression stroke. When the flat side of the, cam

. me p si e he e r 8 he spring 11 evee h e d t ew we el' h s t ke tr kethe h t n 9v d w e e n. s. i ehe se stroke. As the cam rotatesthecylinder lil is m e wa eh i s'd ee a tro w i e e piston 19 is raised onits intake stroke. In the,

action described, a yieldable force is utilized for h el v t ek o th p mpump. While e positive power force is used for'the delivery stroke ofthe other pump. The advantage of this is h he il e hp l ed. under a posie a n w pressure to the part to be lubricated.

To permit manual operation of each unit 1 for the purpose ofaccelerating the oil flow therefrom without disturbing or changing thesetting of the cams 12-, I provide a plunger 25 extending e ewhw r h e,he rve r t eh u it delivery pump.

me ns are p ey dte. ec r he. p t th r through the cover 3 as shown inFigs. 1 and 2. The lower end of the plunger is engageable with itsrocker 13 through an abutment or lug 26 thereon at the end of the rockeropposite its connection with the pump unit. By forcing downward on theplunger the rocker may be moved e eeeeietete r n r e the Q 1 fl w h tethe hih hi e of u it- Each unit by releasing its clamp or set screw 5may be removed intact from the reservoir 2 with out disturbing the otherunits or interfering with their operation. Moreover, any unit may beremoved without requiring that the lubricator be disconneoted from itssource of power or stopping operation or"- the other units. This featureof removalis made possible by having the priming and delivery pumps inalinement and connected as a single fixture. Moreover, by having therocker straddle the unit below the abutment thereon, the unit may belifted intact from the reservoir without disturbing the rocker or itsmounting. in the reservoir. I

The long bearing engagement between the piston and cylinder elements 9and 10 of the delivery pump permit the development of a high Pressu e bysuch pump be aus t e sea t ef uc extent to prevent leakage at highpressures. Thus th primin p mp nee on y. d v le a e ure i i nt t e v tothe del v pum especially at priming. The shor section of the cyl nd coveed by the piston 19 of the priming pump when moving past the intake portis suff cient to provide the seal for this pump.

With th D t-. lement 9 O h d li f pump a h pp r d of h pum in un and ecylinder elem t'ze. o e rimi pump a h low r nd o th unit. th e em nts mae el stationary by connection and contact respecti with he top and bottm we ls the r se i 2- Me eev r, w th he r an eme t t e Parts. t i n l mnt 19 of the primin pum nd h cy ind el m nt 10 i he d ery mp may bearranged between the other elements of h p mps, and he eenhe ed n he f ha member common to the two pumps and operable by the spring 11 androcker l3, respectively. W h a member o ar an ed n ehdehl e ppor d by this on n y n e e emen s of h mi es, he t may e eenhe ed a d l he e ve tum in un the fo h. e se tained single x r h eh eth rb e hte om the re erih. he hewhv in he d a n the ppe end he member Q19 is shape t fit overthe piston element 9 andform the cylinde th r h the lowe end. Of th m mis shaped extend nt e ihde f e em n and r vide he rist htheteteh 1 Theparts of the unit constituting the pumps are connected together and heldin assembled e et' h hr h h ri s 11 we ae ehe e A meta ie 27. ehh ete heneve nd oi e spring '11 with'the' part 28 which supports the unit in eese v r r m. st p Well r ee er has shown in Fig.2. Part 28, to which thepiston element of thedelivery pump is connect-ed, fits in theboss 4 onthe cover Sand is secured on the etter the t ere j e hewh- T e e ehd ofthe spring 11 is conneeted by a similarclip 29 with the slide 1G whichforms the cylinder of the Screws .0 3 1 r e u lent respective supports,namely, the part 28 and the slide 10, as shown. A band-like member 32connects the uper end of the spring 21 with the li e 10 th u h, P etlement ;.9. oi th priming ump. A similar band 33 connects the lower endof the spring 21 to the cylinder element 20 of the priming pump. Thesebands are annular in form, or substantially so, and are shaped to fitover ribs or flanges on the parts which support them and the adjacentconvolutions of the spring as shown in Fig. 2. The upper spring 11 isstronger than the lower spring 21 and is designed to maintain the slide10 against the rock-lever 13 and to force the piston 19 of the primingpump into its cylinder 20 on the discharge stroke of said pump. Thelower spring 21 is strong enough to maintain the cylinder 20 at alltimes againstits abutment on the bottom wall of the reservoir 1. In theparticular unit shown in the drawings, the upper spring 11 is designedfor approximately '30 pounds, this being sufliciently strong to forcethe piston 19 against a pressure of approximately 500 pounds during thepriming period after the pump has run dry. It is not necessary for thelower spring to be any stronger than that required to exert a forcewhich will hold the cylinder 20 against its abutment and to overcome thepressure exerted by the vacuum on the piston employed, which in theparticular assembly illustrated is not in excess of a maximum of l or 2pounds.

The details of construction and arrangement of parts shown and describedmay be variously changed and modified Without departing from the spiritand scope of our invention, except as pointed out in the appendedclaims.

We claim as our invention:

1. A pumping unit for force feed lubricators comprising a supportingmember for the unit, priming and delivery pumps of the reciprocatorytype in coaxial alinement with said member, said pumps each havingrelatively movable cylinder and piston elements, the stationary elementof the delivery pump being directly connected to the supporting member,the movable elements of the pumps being connected together for movementsin unison, a spring connecting the movable element of the delivery pumpwith the supporting member, and a spring connecting the elements ofjacent the upper limit of the intake stroke of the cooperating pistonelement, and springs respectively interposed between the cylinders andpistons of the pumps for imparting relative movements thereto and forretaining the same in operative assembled relation.

3. A pumping unit for force feed lubricators comprising a supportingmember for the unit, priming and delivery pumps of the reciprocatorytype in coaxial alinement with said member, said pumps each havingrelatively movable cylinder and piston elements, the stationary elementof the delivery pump being directly connected to the supporting member,the movable elements of the pumps being connected together for movementsin unison, the cylinder of the priming pump being located at the lowerend of the unit, said priming pump cylinder being relatively stationaryand having a closed lower end and an intake opening disposed thereaboveadjacent the upper limit of the intake stroke of the cooperating pistonelement, a spring connecting the movable element of the delivery pumpwith the supporting member, and a spring connecting the elements of thepriming pump.

4.'A pumping unit for force feed lubricators comprising axially alinedpriming and delivery pumps of the reciprocating type, one of the pumpshaving a relatively stationary piston and the other a relativelystationary cylinder, a rigidly connected cylinder and piston movable forcooperation with the relatively stationary piston and cylinder of saidpumps, and spring means for respectively urging both cylinders outwardlyrelative to their cooperating pistons.

5. A pumping unit for force feed lubricators comprising axially alinedpriming and delivery pumps of the reciprocating type, one of the pumpshaving a relatively stationary piston and the other having a relativelystationary cylinder, a rigidly connected cylinder and piston movable forcooperation with the relatively stationary piston and cylinder of saidpumps, a spring connecting the stationary piston and the movablecylinder of one pump for urging the cylinder outwardly, and a springconnecting the piston and cylinder of the other pump for retaining thecylinder against inward movement.

6. A pumping unit for force feed lubricators comprising a supportingmember for the unit, priming and delivery pumps of the reciprocatorytype in coaxial alinement with said member, each pump including acylinder and a piston, the piston of the delivery pump being rigidlyconnected to the supporting member, the cylinder of the priming pumpbeing relatively stationary and located at the lower end of the unit,the cylinder of the delivery pump and the piston of the priming pumpbeing rigidly connected together for movements in unison, a coil springinterposed between the supporting member and the cylinder of thedelivery pump for imparting movement in one direction to the rigidlyconnected cylinder and piston and for connecting the delivery pumpcylinder with the supporting member, and a coil spring interposedbetween and connecting the piston and the cylinder of the priming pumpand for retaining the cylinder of the priming pump against movementtowards the support, said springs also serving to hold the pistons andthe cylinders of the pumps in operative assembled relation.

7. In a force feed lubricator, the combination with a reservoirincluding a bottom, of a pumping unit located within the reservoir andcomprising axially alined priming and delivery pumps of thereciprocatory type, each pump including cylinder and piston elementsmovable one relative to the other, the cylinder of the priming pumpbeing engageable with the bottom of the reservoir, 2. spring interposedbetween the elements of the delivery pump for urging one of saidelements downwardly, and a spring interposed between the elements of thepriming pump for retaining the cylinder element against the bottom ofthe reservoir, and means for actuating the relatively movable elementsof the pumps.

8. In a, force feed lubricator, the combination with an oil reservoirhaving a bottom and a top, the latter having an opening, of axiallyalined priming and delivery reciprocating pumps removably mounted as aunit in the opening of said top and having the priming pump locatedadjacent the bottom of the reservoir, the priming pump having a cylinderresting against the hottom, the delivery pump having a piston rigidly1'50 supported by the top, av rigidly connected piston and cylinderrespectively associated with the. priming pump cylinder and with thedelivery pump piston, a coil spring disposed intermediate the cylinderand piston of the priming pump, a coil spring disposed intermediate thepiston and cylinder of the delivery pump and having a greater tensilestrength than the priming pump spring, ancl'means located within thereservoir and engageable with the rigidly connected piston and cylinderto move the same against the resistance of the delivery pump spring.

9. A pumping unit for force feed lubricators comprising axially alignedpriming and delivery pumps of the reciprocatory type, said pumps eachhaving relatively movable cylinder and piston elements, the stationaryelements of the pumps being at the opposite ends of the unit, themovable elements of the pumps being between the stationary elements andrigidly connected together for movements in unison and springsrespectively interposed between the cylider and piston elements of thepumps for imparting relative movements 25 7 theret and for re aining thesame in e t axial alin mentr v r 10. A pumping unit for force feedlubricators comprising a supporting member, priming and delivery pumpsof the reciprocatory type below sa member and in co-axial alignmenttherewith, said pumps each having relatively movable cylinder and pistonelements, the stationary element of the priming pump being located atthe lower end of the unit, the stationary element of the delivery pumpbeing connected to and supported by said member, the movable elements ofthe pumps being interposed between the stationary elements and connectedtogether for movements in unison, a spring connecting the movableelement of the delivery pump with the support as afforded by saidmember, a spring connecting the elementsof the priming pump, and a sightfeed device above and supported by said member, the latter serving a-sasupport for the pumps and the sight feed and having an oil passageconnecting the pumps with the sight feed.

V V CLYDE A. PARSONS.

LOUIS W. DROTT.

